active 1867-1892 M. (Mary) Lee

Mary Susanna Lee (1846–1908) was an English writer of children's fiction who usually worked in partnership with her sister, Catherine Harriet Lee. The two sisters published as M. and C. Lee or Mary and Catherine Lee, and their books were often written for younger readers.

Their fiction frequently drew on historical settings, blending adventure with accessible storytelling. Among the works linked to Mary Lee in library and public-domain records are The Oak Staircase and Told After Tea, which show the sisters' range from historical narrative to shorter, more domestic reading for children.

Because the sisters commonly published together, biographical details about Mary Lee are often presented alongside Catherine's rather than separately. A clear confirmed portrait of Mary Susanna Lee was not available from the sources reviewed, so no profile image is included.